This information is for research and educational purposes only. No medical recommendations. Products are not approved for human use. For health questions, consult a doctor.

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Muscle & performance

Blend 500 (Tren E + Mast E)

A high-concentration cut stack: trenbolone enanthate plus masteron enanthate, both in the long ester form.

1 min read 1 sources Updated May 2026
Class
Steroid stack (Tren E + Mast E)
Use
Intramuscular / subQ possible (oil, in mg/week)
Contents
Trenbolone-E + masteron-E (500mg/ml)
WADA
Banned (category S1)

What is Blend 500?

Blend 500 combines trenbolone enanthate and masteron enanthate in a high-concentration oil (500mg/ml total). Both are in the long enanthate ester form, so for more stable, less frequent dosing. It is a classic cut/hardness stack without a testosterone base.

Anabolic steroids, not peptides, ready to use.

How it works

Trenbolone is the potent muscle/strength driver, masteron the DHT derivative for a drier, harder look and mild anti-estrogenic action. Both do not aromatize. Without a testosterone base, however, the "feel-good hormone" is missing, so many add a test preparation.

Use

Intramuscular (glute, thigh), ready to use. The high concentration means a small volume is enough.

  • Inject with a clean IM needle, disinfect the injection site.
  • Rotate injection sites.
  • Subcutaneous: both esters are long (depot-friendly), but the tren component irritates subcutaneous tissue - subQ only low volume and if well tolerated, many stick with IM.

Dosing

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What the research shows

The individual compounds are described (trenbolone: Yarrow, 2010; masteron as a DHT derivative). For the fixed combination there is no study, the benefit derives from the individual compounds. High-dose performance use is not study-proven.

Side effects

  • Harsh tren profile: sleep problems, night sweats, irritability, prolactin.
  • Without a test base, often a libido crash and poor wellbeing.
  • Lipid shift, cardiovascular load, hair-loss risk.

Practice

  • Not a beginner stack, the tren part defines the profile.
  • A testosterone base is usually added, otherwise wellbeing suffers.
  • Watch bloodwork, plan a post-cycle, banned in official competition (WADA S1).

Storage

Store at room temperature, cool and protected from light, out of reach of children. Keep the original bottle closed and mind the expiry date.

Practice

PCT / after coming off

Anabolic substances suppress the body's own testosterone production in the research context. Anyone who comes off a cycle (rather than running it continuously) typically uses a post-cycle therapy (PCT) to restart the natural axis (HPTA).

The standard scheme in the research/literature context combines a SERM (tamoxifen and/or clomifene, alternatively enclomiphene) over roughly four weeks, optionally preceded by HCG to re-sensitise the testes before the SERM block. An aromatase inhibitor (anastrozole/exemestane) belongs more to on-cycle estrogen control than to the PCT itself.

19-nor note: nandrolone and trenbolone are progestagenic and can raise prolactin. The literature additionally discusses a prolactin-lowering agent (cabergoline) and a somewhat longer wash-out window here.

Tip: order the PCT items together with the cycle so they are already on hand when you come off.

This information serves research and educational purposes only. Not medical advice.

Evidence

Sources

  1. 1 Tissue selectivity and pharmacology of trenbolone (a potent anabolic steroid). Yarrow et al., Steroids, 2010

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